PG Thesis

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Subject: search.filters.subject.Plant protection

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    Effect of nitrogen and spacing on the growth yield and quality of rice var Jyothi
    (Department of Agronomy, College of Agriculture, Vellayani, 1979) Prabhakaran Thampi, C K; Madahavan Nair, K P
    An investigation was conducted at the College of Agriculture, Vellayani during the late viruppu season in 1974 to study the effects of graded doses of nitrogen and different spacings on the growth, yield and quality of rice var. Jyothi. The levels of nitrogen tried were 30,60,90 and 120 kg/ha and the spacings adopted were 10cm * 10cm, 10cm*15 and 10cm *20cm. The experiment was laid out in a randomised block design.
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    Investigations on tho causes of poor productivity of rice soils of Pazhamchira ela in Chirayinkil Taluk
    (Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani, 1986) Girija, V; Abdul Hameed
    An Investigation into the causes of tho poor productivity of tho rice fields in tho Pazhamchira "ela” at Mel- kadakkavur of Chirayinkll Taluk was taken up to suggest ways and moans to Increase rlco and straw production and to bring to light tho physico-chemical characteristics of tho soil. Fifty surface soil samples and two profiles wore examined, analysed and investigated. Field trials in Randomised Block Design spread over the Kharif and Rabi seasons of 1934-85 with rice varieties Ptb-9 and Vyttila-1 respectively were conducted in a cultivator's field. The surface soil studies revealed that the soils were highly acidic with appreciable electrical conductivity. The soils were of low CEC, with an average base saturation of 49*7 with more than 59 percent of the exchange sites occupied by exchangeable A1 and iron. The N and K content of the soils were low to medium and P content was low.
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    To study the impact of institutional credit and its influence in the behaviour of farmers in adopting high yielding varieties of paddy cultivation
    (Department of Agricultural Extension, College of Agriculture, Vellayani, 1978) Bhaskaran, S; Tampi, A M
    This study is designed to study the Impact of Institutional Credit and its influence in the behaviour of farmers in adopting High Yielding Varieties of Paddy Cultivation. In this study, 125 farmers of the Anacode I.P.D. Unit, Trivandrum District, were interviewed so as to assess their extent of total adoption of the package of practices recommended by Kerala Agricultural University. The study also pertains to their credit need and utilization to cultivate the High Yielding Varieties of paddy. The data was tabulated and statistically analysed to reveal their adoption behaviour pertaining to the implementation of High Yielding Variety programme in the unit. 52 per cent of the progressive farmer and 48 per cent of the less progressive fanners were found to be high adopters of the package of practices. The average credit need of the farmers was found to be Rs. 1,095.87. less progressive high adopters were found to require the highest credit need. Almost all the farmers utilized their credit offered by institutions in full. In general no relationship was evidenced between age, extent of holding, education, risk perception, perception of cost of innovation, perception of profitability, social participation, occupation and caste and between extent of adoption and credit utilization.Intensive Paddy Development Unit secured first preference amongst others, viz . Co-operative Bank, Commercial Bank, land Mortgage Bank, Money lenders, neighbour and Relatives pertaining to timely lending, lower interest rate and easy lending procedure.
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    Nutrient management of upland rice (Oryza sativa L.) varieties in coconut garden
    (Department of Agronomy, College of Agriculture, Vellayani, 2001) Anu, S; Jayakrishnakumar, V
    A field experiment was conducted at the Instructional Farm of the College of Agriculture, Vellayani during the first crop season of 2000 to study the nutrient management of upland rice varieties in coconut garden. The experiment was laid out in 3 x 3 x 2 asymmetrical confounded factorial design with 2 replications. The treatments included 2 varieties (Swarnaprabha and Mattatriveni), three levels of nitrogen (40, 60, 80 kg ha') and three levels of potassium (15, 30, 45 kg ha"). Results of the experiment revealed that the varieties and different levels of nitrogen and potassium had significant influence on most of the biometric and yield attributing characters of upland rice. Fertilizing the crop at 80 kg N ha": and 45 kg K20 halwas found to significantly influence the biometric and yield attributes. Among the varieties, Mattatriveni was superior to Swarnaprabha in most of the biometric and yield attributing characters. The quality characters like proline content, protein content and chlorophyll content were significantly influenced by the highest levels of nitrogen and potassium. Mattatriveni recorded the highest protein content and Swarnaprabha recorded the maximum proline content. The uptake of nutrients was profoundly influenced by the different treatments.Increaseduptake of nutrients was recorded at higher levels of nitrogen and potassium. Mattatriveni registered the highest uptake of nutrients at all growth stages. Increasing the levels of nitrogen and potassium increased the soil available nutrients. Plots grown with Mattatriveni registered the highest values for soil available nitrogen and potassium. The results of the economic analysis revealed that BeR was maximum with the highest levels of N (80 kg ha") and K (45 kg ha-1). The varieties did not differ in the benefit cost ratio.
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    Suitability of upland rice cultivars (Oryza sativa L.) for shaded situations
    (Department of Agronomy, College of Agriculture, Vellayani, 2000) Sunilkumar, B; Geethakumari, V L
    A field experiment was conducted at College of Agriculture, Vellayani) to assess the effect of varying levels of solar radiation and silica on the performance of upland rice cultivars. This study also aimed at computing the economics of upland rice cultivation and silica application. The treatments included three shade levels (0, 20 and 40 per cent), two levels of silica (no silica and 100 kg ha-' silica) and four varieties (Swarnaprabha, A4-4-2, A4-1- 3 and Matta Triveni). Shade was imposed by using shade nets of appropriate shade levels and silica was applied as sodium silicate. The experiment was laid out in split-split plot design. The results of the investigation are summarised below. Solar radiation influenced growth attributes significantly. A significant reduction was observed in tillering, LAD, proline content, SL W, LAI, culm strength, root weight, root length and root-shoot ratio as the shade advanced to 20 and 40 per cent levels. Among the growth attributes only plant height and chlorophyll content increased significantly with increase in shade level. Yield contributing characters were also significantly influenced by solar radiation. Maximum number of productive tillers, spikelets per panicle, thousand grain weight, length and weight of panicle was observed in the open situation. A significant reduction in grain yield was observed with increase in shade level. Maximum productivity was registered at 0 per cent shade level which was 68 and 387 per cent higher than 20 and 40 per cent shade levels. Same trend was observed in DMP. Maximum straw yield was recorded at 20 per cent shade which was on par with zero per cent shade. Application of silica increased total chlorophyll content, chlorophyll a/b ratio, root length and root weight significantly. Grain and straw yield increased significantly by 22 and 18 per cent with the application of silica. In the open situation A4-4-2 recorded maximum grain yield. At 20 per cent shade level A4-4-2 and Matta Triveni top seeded other cultivars. Swarnaprabha recorded maximum straw yield In the open situation. Compared to open situation at 20 per cent shade level straw yield increased significantly in A4-4-2 and Matta Triveni. Sodium silicate was found as an un-economical source of Si for upland nee. Silica nutrition can be made economical by substituting sodium silicate with a cheaper source of silica. B : C ratio reduced significantly with increase in shade level. The treatment LoS I V I registered maximum B : C ratio of 1.35.